Compatible Parts for LFP-4000A Jack Connector This is a 4-channel connector, with one spare. Please confirm the parts yourself, as the LFP-4000A may have different parts depending on the manufacturing date. Parts that do not have black terminals are definitely different. Soldering is required for repairs. Also, the jack is more securely tightened than the original connector, so if you want to standardize them, we recommend replacing all of them. Please proceed at your own risk.